/*
* BearLibTerminal
* Copyright (C) 2013-2016 Cfyz
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

#ifndef BEARLIBTERMINAL_LOG_HPP
#define BEARLIBTERMINAL_LOG_HPP

#include <string>
#include <sstream>

namespace BearLibTerminal
{
    class Log
    {
    public:
        enum class Level
        {
            Fatal, Error, Warning, Info, Debug, Trace
        };
        enum class Mode
        {
            Truncate, Append
        };

    public:
        void Write( Level level, const std::wstring &what );

        void Reset( );

        static Log &Instance( );

        std::wstring filename;
        Level level;
        Mode mode;

    private:
        Log( );

        bool m_truncated;
    };

    std::wostream &operator<<( std::wostream &stream, Log::Level value );

    std::wistream &operator>>( std::wistream &stream, Log::Level &value );

    std::wostream &operator<<( std::wostream &stream, Log::Mode value );

    std::wistream &operator>>( std::wistream &stream, Log::Mode &mode );
}

#define LOG( level_, what )\
    do\
    {\
        if (BearLibTerminal::Log::Level::level_ <= BearLibTerminal::Log::Instance().level)\
        {\
            std::wostringstream wss_;\
            wss_ << what;\
            BearLibTerminal::Log::Instance().Write(BearLibTerminal::Log::Level::level_, wss_.str());\
        }\
    }\
    while (0)

#endif // BEARLIBTERMINAL_LOG_HPP
